Nitwits refuse to go to bed at night.

I brought a raid to a relatively full village, and unfortunately it ended up decimating the village population down to 1 nitwit. Now, for some reason, this nitwit is refusing to go to bed even when it's the middle of the night. He's running around the village being a, well, nitwit. I tried repopulating the village like a cheater by spawning in like one or two new villagers. The first villager I spawned next to a workspace and he became a weaponsmith, the second however stayed a nitwit, and did the same thing as the other nitwit. They're just running around, instead of going to bed and being civilized peoples.

Update: So it seems they DID go to bed, but only long after midnight.